Quite significant. “This increase represents a 16% correction, which is large enough to explain the persistent overestimation of growth rates of historical atmospheric CO2 by Earth system models. Without this correction, the CFE for global GPP is underestimated by 0.05 PgC/y/ppm. This finding implies that the contemporary terrestrial biosphere is more CO2 limited than previously thought.”
It seems to me the take-away is that we are only beginning to have enough CO2 in the air for the plants. As the plants optimize to the slightly more plentiful plant food, they will increase their uptake even more.
It is worthwhile to keep in mind that while rates of burning have been ever increasing for decades, the CO2 concentration has been growing approximately linearly. While we have been tracking CO2, it grows steady, but the amount of CO2 we humans are adding goes up faster every year. It sure seems the plants are screaming, “THANK YOU!”

Watts Up With That?

Global climate models have underestimated the amount of CO2 being absorbed by plants, according to new research.

Scientists say that between 1901 and 2010, living things absorbed 16% more of the gas than previously thought.

The authors say it explains why models consistently overestimated the growth rate of carbon in the atmosphere.

But experts believe the new calculation is unlikely to make a difference to global warming predictions.

The research has been published in the journal, Proceedings of the National Academy of Sciences.

Working out the amount of carbon dioxide that lingers in the atmosphere is critical to estimating the future impacts of global warming on temperatures.

Source: http://www.bbc.co.uk/news/science-environment-29601644

Significance:

Understanding and accurately predicting how global terrestrial primary production responds to rising atmospheric CO2 concentrations is a prerequisite for reliably assessing the long-term climate impact of anthropogenic fossil CO2 emissions. Here we demonstrate that current carbon cycle models…

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